Commonly used Natural Indicators
Commonly used Natural Indicators: Overview
In this topic, we will explore the concept of commonly used natural indicators. We will study litmus, turmeric, china rose, beetroot and purple cabbage as indicators.
Important Questions on Commonly used Natural Indicators
A synthetic indicator that remains colourless in acidic medium: _____. (Methyl orange/ Methyl red/ Phenolphthalein)
A vegetable used as a natural indicator : _____. (Beetroot/ Tomato)
An example of natural indicator _____. (Phenolphthalein/ Litmus)
The most common indicator used in the laboratory. (litmus / turmeric)
A substance used to test the acidic or basic nature of another substance is:
What are indicators? With the help of an activity show that turmeric acts as an indicator.
List four properties of acids and bases.
Which substance is used to differentiate between acids and bases? Define it.
Solve the following crossword puzzle.
Across
2. Bases which are soluble in water
4. This indicator is also used as a spice
5. It is a substance which is neither acidic nor basic
Down
1. It is used to treat acidity in humans
3. It is the most common indicator
Which is not an indicator?
